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Simon Willison's Weblog Supports Webmention

Anthropic's Project Glasswing - restricting Claude Mythos to security researchers - sounds necessary to me

Anthropic didn't release their latest model, Claude Mythos (system card PDF), today. They have instead made it available to a very restricted set of preview partners under their newly announced Project Glasswing. The model is a general purpose model, similar to Claude Opus 4...

Mitchell Hashimoto Valid

The Building Block Economy

Mitchell Hashimoto Valid

The Building Block Economy

Krebs on Security
• BrianKrebs

Russia Hacked Routers to Steal Microsoft Office Tokens

Hackers linked to Russia's military intelligence units are using known flaws in older Internet routers to mass harvest authentication tokens from Microsoft Office users, security experts warned today. The spying campaign allowed state-backed Russian hackers to quietly siphon authentication tokens from users on more than 18,000 networks without deploying any malicious software or code.

Dwarkesh Podcast
• Dwarkesh Patel

Michael Nielsen – How science actually progresses

The true story of Einstein, Newton, and Darwin

Pluralistic: Daily links from Cory Doctorow
• Cory Doctorow

Pluralistic: Switzerland's Goldilocks fiber (07 Apr 2026)

Today's links Switzerland's Goldilocks fiber: Public provision is a layered question. Hey look at this: Delights to delectate. Object permanence: EU appoints henhouse fox (copyright); Emacs x Tron: Legacy; Spammer v dead man's AOL account; Scott Walker's pork fountain; "No to...

Anil Dash Valid

Actually, people love to work hard

One of the most infuriating tropes that I see repeated in media is executives (usually from boring old companies) insisting that their employees don’t want to work hard. Media outlets dutifully repeat this pernicious lie, despite there being no evidence to back it up, and th...

Troy Hunt Supports Webmention
• Troy Hunt

Weekly Update 498

Weekly Update 498

This week, more time than I'd have liked to spend went on talking about the trials of chasing invoices. This is off the back of a customer (who, for now, will remain unnamed), who had invoices stacking back more than 6 months overdue and despite payment terms of

Entropic Thoughts
• kqr

Readership maths skills

Many of you get notified of new articles via RSS, and some of you stay tuned through the email newsletter. The email subscribers have, in the past three weeks, answered a survey on their understanding of maths topics. I asked three questions of increasing difficulty:

  1. How advanced maths have you formally studied?
  2. How advanced maths are you still comfortable using?
  3. How advanced maths do you know well enough to teach someone else?

(Continue reading the full article on the web.)

Jim Nielsen’s Blog Valid

Prototyping with LLMs

Did you know that Jesus gave advice about prototyping with an LLM? Here’s Luke 14:28-30: Suppose one of you wants to build a tower. Won’t you first sit down and estimate the cost to see if you have enough money to complete it? For if you lay the foundation and are not able ...

Pluralistic: Daily links from Cory Doctorow
• Cory Doctorow

Pluralistic: Your boss wants to use surveillance data to cut your wages (06 Apr 2026)

Today's links Your boss wants to use surveillance data to cut your wages: Tech rights are labor rights (again). Hey look at this: Delights to delectate. Object permanence: Arthur C Clarke v Buddhist monks (x DST); Bomb squad v life-size Mario power-ups; Panama Papers; Chinese...

Simon Willison's Weblog Supports Webmention

Google AI Edge Gallery

Google AI Edge Gallery Terrible name, really great app: this is Google's official app for running their Gemma 4 models (the E2B and E4B sizes, plus some members of the Gemma 3 family) directly on your iPhone. It works really well. The E2B model is a 2.54GB download and is bo...

Simon Willison's Weblog Supports Webmention

datasette-ports 0.2

Release: datasette-ports 0.2

  • No longer requires Datasette - running uvx datasette-ports now works as well.
  • Installing it as a Datasette plugin continues to provide the datasette ports command.

Tags: datasette

Simon Willison's Weblog Supports Webmention

scan-for-secrets 0.3

Release: scan-for-secrets 0.3

  • New -r/--redact option which shows the list of matches, asks for confirmation and then replaces every match with REDACTED, taking escaping rules into account.
  • New Python function redact_file(file_path: str | Path, secrets: list[str], replacement: str = "REDACTED") -> int.

Tags: projects

Simon Willison's Weblog Supports Webmention

Cleanup Claude Code Paste

Tool: Cleanup Claude Code Paste

Super-niche tool this. I sometimes copy prompts out of the Claude Code terminal app and they come out with a bunch of weird additional whitespace. This tool cleans that up.

Screenshot of a web tool titled "Cleanup Claude Code Paste" with the subtitle "Paste terminal output to remove the ❯ prompt, fix wrapped-line whitespace, and join lines into clean text." An input textarea contains pasted terminal output starting with "❯ Add a -r/--redact option which asks for user approval (after telling it how many replacements will happen and in which files and which lines – standard output basically) and then rewrites the files in that folder to replace all matched secrets with REDACTED. Run tests with 'uv run pytest' and use red/green TDD". Below is a "Cleaned output:" section showing the same text with the ❯ prompt removed and whitespace cleaned up. A blue "Copy to clipboard" button appears at the bottom.

Tags: tools, claude-code

Simon Willison's Weblog Supports Webmention

datasette-ports 0.1

Release: datasette-ports 0.1

Another example of README-driven development, this time solving a problem that might be unique to me.

I often find myself running a bunch of different Datasette instances with different databases and different in-development plugins, spreads across dozens of different terminal windows - enough that I frequently lose them!

Now I can run this:

datasette install datasette-ports
datasette ports

And get a list of every running instance that looks something like this:

http://127.0.0.1:8333/ - v1.0a26
  Databases: data
  Plugins: datasette-enrichments, datasette-enrichments-llm, datasette-llm, datasette-secrets
http://127.0.0.1:8001/ - v1.0a26
  Databases: creatures
  Plugins: datasette-extract, datasette-llm, datasette-secrets
http://127.0.0.1:8900/ - v0.65.2
  Databases: logs

Tags: datasette

Simon Willison's Weblog Supports Webmention

Eight years of wanting, three months of building with AI

Eight years of wanting, three months of building with AI Lalit Maganti provides one of my favorite pieces of long-form writing on agentic engineering I've seen in ages. They spent eight years thinking about and then three months building syntaqlite, which they describe as "h...

Krebs on Security
• BrianKrebs

Germany Doxes “UNKN,” Head of RU Ransomware Gangs REvil, GandCrab

An elusive hacker who went by the handle "UNKN" and ran the early Russian ransomware groups GandCrab and REvil now has a name and a face. Authorities in Germany say 31-year-old Russian Daniil Maksimovich Shchukin headed both cybercrime gangs and helped carry out at least 130 acts of computer sabotage and extortion against victims across the country between 2019 and 2021.

Martin Alderson
• Martin Alderson

What next for the compute crunch?

AI compute demand is growing exponentially while supply constraints bite hard. The next 18-24 months are going to be defined by shortages, rationing and price discovery.

Simon Willison's Weblog Supports Webmention

Quoting Chengpeng Mou

From anonymized U.S. ChatGPT data, we are seeing:

  • ~2M weekly messages on health insurance
  • ~600K weekly messages [classified as healthcare] from people living in “hospital deserts” (30 min drive to nearest hospital)
  • 7 out of 10 msgs happen outside clinic hours

Chengpeng Mou, Head of Business Finance, OpenAI

Tags: ai-ethics, generative-ai, openai, chatgpt, ai, llms